Hydrometers are instruments designed for measuring specific characteristics of a liquid, such as relative density or specific gravity, and are suitable for various applications and settings where these measurements must be monitored.
For reporting the measured specific gravity of a liquid relative to water. Brannan™ BS 718 M100 Density Hydrometers are manufactured from soda glass, steel shot ballast and synthetic wax resin.
These combined-form hydrometers, with convenient, built-in thermometer, measure the relative density (specific gravity) of oil and petroleum related products in various ranges from -1° to 101°API